﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Duck:Animal,Iswim
    {
        public Duck(string brand) : base(brand)
        {
        }
        public void Swim()
        {
            Console.WriteLine("{0}正在游泳..", Brand);
        }
    }
}
